Home / 812,100.30-1,218,213.34-272,359.64

Finding the Fourth Proportional to 812,100.30, 1,218,213.34 and 272,359.64

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Solution

The fourth proportional to 812,100.30, 1,218,213.34 and 272,359.64 is: 408,560.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,100.30 : 1,218,213.34 = 272,359.64 : x
  2. Step 2: Convert to fraction form
    812,100.30/1,218,213.34 = 272,359.64/x
  3. Step 3: Cross multiply
    812,100.30x = 1,218,213.34 × 272,359.64
  4. Step 4: Simplify right side
    812,100.30x = 331,792,146,725.60
  5. Step 5: Solve for x
    x = 331,792,146,725.60/812,100.30
  6. Step 6: Final answer
    x = 408,560.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.